Lobrathium wutaium, Assing, 2014

Assing, V., 2014, A revision of Palaearctic Lobrathium. V. Three new species from the Himalaya and China, a new synonymy, and additional records (Coleoptera: Staphylinidae: Paederinae), Linzer biologische Beiträge 46 (1), pp. 429-441 : 435-436

Lobrathium wutaium nov.sp. ( Figs 4-7 , 10-11 )

T y p e m a t e r i a l Holotype 6: " CHINA Shanxi, Wutaishan , 4-5.VI.1993, G. de Rougemont / Holotypus 6 Lobrathium wutaium sp. n., det. V. Assing 2013" (cRou).

E t y m o l o g y: The specific epithet is an adjective derived from the name of the mountain where the holotype was collected.

D e s c r i p t i o n: Species of moderate size; body length 7.2 mm; length of forebody 3.8 mm. Habitus as in Fig. 4 . Coloration: forebody reddish; abdomen brown; legs reddish-yellow; antennae reddish.

Head ( Fig. 5 ) weakly oblong, 1.03 times as long as broad; posterior angles rounded, weakly marked; punctation moderately coarse and dense, somewhat sparser in median dorsal portion. Eyes small and weakly convex, slightly less than one third as long as distance from posterior margin of eye to neck in dorsal view. Antenna 2.4 mm long.

Pronotum ( Fig. 5 ) slender, 1.35 times as long as broad and approximately 0.9 times as broad as head; punctation similar to that of head, but somewhat less dense; interstices slightly narrower than average diameter of punctures; impunctate midline moderately broad.

Elytra ( Fig. 5 ) of moderate length, 0.93 times as long as pronotum; humeral angles marked; punctation irregularly diagonally seriate, dense, and approximately as coarse as, though somewhat less defined than, that of pronotum; interstices without microsculpture. Hind wings present, but possibly of reduced length.

Abdomen approximately as broad as elytra; punctation fine and very dense; anterior impressions of tergites III-VII very sparsely punctate, smooth, only with indistinct microsculpture; interstices of remainder of tergal surfaces with fine and distinct microsculpture; posterior margin of tergite VII with palisade fringe.

6: protarsomeres I-IV strongly dilated; tergite VIII with moderately convex posterior margin; sternite VII ( Fig. 10 ) distinctly transverse and with shallow, extensive posteromedian impression, this impression with dark setae directed diagonally postero-mediad, posterior margin broadly concave; sternite VIII ( Fig. 11 ) as long as broad and with oblong median impression, this impression with numerous distinctly modified short and stout black setae, posterior excision of moderate size, its depth approximately one fifth of the length of sternite; aedeagus ( Figs 6-7 ) 1.45 mm long and symmetric; ventral process long and massive in relation to capsule, ventrally with transverse carinae, and apically acute in ventral view.

C o m p a r a t i v e n o t e s: This species is characterized particularly by the reddish coloration of the forebody, the moderately long elytra (distinctly shorter than the

pronotum), and the male sexual characters, particularly the distinctive shape of the ventral process of the aedeagus.

D i s t r i b u t i o n a n d n a t u r a l h i s t o r y:Theholotypewascollectedin the Wutai Shan in Shanxi province, China. Additional data are not available.

Figures

Figs 1-7: Lobrathium subcaeruleum nov.sp. (1-3) and L. wutaium nov.sp. (4-7): (1, 4) habitus; (2, 5) forebody; (3, 6-7) aedeagus in lateral and in ventral view. Scale bars: 1.0 mm.

Figs 8-11: Lobrathium subcaeruleum nov.sp. (8-9) and L. wutaium nov.sp. (10-11): (8, 10) male sternite VII; (9, 11) male sternite VIII. Scale bars: 0.5 mm.